Can not initialize ESP module in Arduino SoftwareSerial

Question

Can not initialize ESP module in Arduino SoftwareSerial's example sketch in configuring WiFi module.

In the sketch it tells:

#include "WiFiEsp.h"
// Emulate Serial1 on pins 6/7 if not present
#ifndef HAVE_HWSERIAL1
#include "SoftwareSerial.h"
SoftwareSerial Serial1(11,12); // RX, TX
#endif

I plugged jumper wires in from esp8266 RX to Digital 11 of mega which is RX and TX of esp8266 to Digital 12 of mega, and I compile the code and looked at the Serial Monitor, but it says:

[WiFiEsp] Initializing ESP module
[WiFiEsp] >>> TIMEOUT >>>
[WiFiEsp] >>> TIMEOUT >>>
[WiFiEsp] >>> TIMEOUT >>>
[WiFiEsp] >>> TIMEOUT >>>
[WiFiEsp] >>> TIMEOUT >>>
[WiFiEsp] Cannot initialize ESP module

Advise is greatly appreciated.

• Juraj: it is not SoftwareSerial on Mega. Mega has Serial1. did you connect ground? connect Rx to TX and TX to RX. use pins of hardware Serial1 of Mega
• Karena: Yes i connect the ground, my esp01 responds if the connection is RX of esp01 to TX of mega and TX of esp01 to RX of mega.

Answer 1

#ifndef HAVE_HWSERIAL1
#include "SoftwareSerial.h"
SoftwareSerial Serial1(11,12); // RX, TX
#endif

Because your Mega has a Hardware Serial1 port, HAVE_HWSERIAL1 is defined. Thus the lines inside that preprocessor conditional will not be compiled. This means you should connect the ESP8266 to the Serial1 lines on your Mega:

Mega | ESP8266
--------------
19 | TX
18 | RX

• Karena: I try to plug it in mega's 18 with esp01's TX and 19 with esp01's RX and reverse but still gives me time out :( i don't know what to do now.
• Karena: And also it gives me :error compiling for board arduino /genuino mega or mega2560. please sir help.
• Juraj: first of all the sketch with WiFiEsp library must compile. what are the error details?
• Karena: I download the library in this link:github.com/bportaluri/WiFiEsp and tried the ConnectWPA example.
• Juraj: and the compile error? changing connections is for nothing if the code doesn't compile and upload